Personally don't see any issues with the front end, it looks simple and functional - certainly not polarising by any means.
Some folks are never happy with any design BMW come out with these days, first it was the big grille of the G8x and when bmw give the baby M a 'normal' grille then it's everything else with the front facia and at this stage the final product hasn't even been seen yet. Some ppl just can't stop whinging I guess